Universal Remote Control MX-880Z - SPECS SHEET Technical Information PDF herunterladen (Seite 21)

™

Masterpact™ NT and NW Universal Power Circuit Breakers

Micrologic™ Electronic Trip Systems

05/2014

Power Supply Information

Ammeter (A) Trip Unit Without 24 Vdc Power Supply at F1 and F2

•

Provides fault protection for LSIG functions

•

Provides LED trip indication (powered by an onboard battery)

•

All display functions and trip unit features power-up with current flow on one phase greater than or

equal to the values in the table to the left

•

Ground-fault push-to-trip button works for testing ground fault with current flow on one phase

greater than or equal to the values shown in the following table

Ammeter (A) Trip Unit With 24 Vdc Power Supply at F1 and F2

The Ammeter (A) trip unit provides all of the above plus additional functionality when powered by

external 24 Vdc power supply:

•

Ammeter and bar graph displays are functional with or without current flowing through the circuit

breaker

•

Trip settings and (Max) current readings can be accessed on the display by pressing navigation

button with or without current flowing through the circuit breaker

•

Ground-fault push-to-trip button works for testing ground fault with or without current flowing

through the circuit breaker

•

Optional Modbus™ communications—Also requires a separate 24 Vdc power supply for the circuit

breaker communications module

NOTE: Ground-fault push-to-trip button will also be functional if a hand-held test kit or full-function test

kit is powering the trip unit.

Power (P) and Harmonic (H) Trip Unit Without 24 Vdc Power Supply at F1 and F2

The P and H trip units were designed to be used with the external 24 Vdc power supply. The large LCD

display requires too much current to be powered by current flow through the circuit breaker. The P and

H trip units do have a voltage power supply which will power the trip unit with 100 Vac or more between

two phases or phase to neutral. The standard configuration for the voltage probes inside the circuit

breaker is at the bottom connections. If the circuit breaker was open in a top fed application, there

would be no voltage at the bottom of the circuit breaker and the trip unit would not be powered.

•

Provides fault protection for LSIG functions

•

Provides LED trip indication (powered by an onboard battery)

NOTE: Ground-fault push-to-trip button works for testing ground fault if the trip unit is powered by the

voltage power supply. The ground-fault push-to-trip is also functional if a hand-held test kit or full-

function test kit is powering the trip unit.

Power (P) and Harmonic (H) Trip Unit With 24 Vdc Power Supply at F1 and F2

•

Provides all of the above

•

LCD display and backlight are functional

•

Ground-fault push-to-trip button works for testing ground fault

•

All metering, monitoring, and history logs are functional

•

Communications from trip unit to M2C and M6C programmable contact modules are powered by a

24 Vdc supply at F1 and F2. M6C also requires a 24 Vdc external power supply

•

Modbus communications—Also requires a separate 24 Vdc power supply for the circuit breaker

communications module.

NOTE: Ground-fault push-to-trip button will also be functional if hand-held test kit or full-function test kit

is powering the trip unit.

Sensor Plug

Value (In)

Minimum

Ground-

Fault

Pickup

100–250 A

30% of

sensor

rating

400–1200 A

20% of

sensor

rating

1600–6300 A 500 A

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 179 180

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